package com.itheima.utils;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyun.oss.model.DeleteObjectsRequest;
import com.aliyun.oss.model.DeleteObjectsResult;
import com.aliyun.oss.model.ObjectListing;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.ByteArrayInputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.stream.Collectors;

@Component// 被ioc容器管理，创建bean对象名称aliyunOSSOperator
public class AliyunOSSOperator {

    /*private String endpoint = "https://oss-cn-shenzhen.aliyuncs.com";
    private String bucketName = "sz151-web";*/


    /**
     * Value读取配置项的值
     * : 给默认值
     */
    /*@Value("${aliyun.oss.endpoint:abc}")
    private String endpoint;
    @Value("${aliyun.oss.bucketName:bbb}")
    private String bucketName;*/

    @Autowired
    private AliyunOSSProperties aliyunOSSProperties;

    /**
     * 上传文件并返回url地址
     *
     * @param content
     * @param originalFilename
     * @return
     * @throws Exception
     */
    public String upload(byte[] content, String originalFilename) throws Exception {
        String endpoint = aliyunOSSProperties.getEndpoint();
        String bucketName = aliyunOSSProperties.getBucketName();

        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填写Object完整路径，例如202406/1.png。Object完整路径中不能包含Bucket名称。
        //获取当前系统日期的字符串,格式为 yyyy/MM
        String dir = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy/MM"));
        //根据原始文件名originalFilename, 生成一个新的不重复的文件名
        String newFileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));
        String objectName = dir + "/" + newFileName;

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        //文件上传
        try {
            ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(content));
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
        String[] split = endpoint.split("//");
        //"https://oss-cn-shenzhen.aliyuncs.com"
        return split[0] + "//" + bucketName + "." + split[1] + "/" + objectName;
    }

    public List<String> list() throws Exception {
        String endpoint = aliyunOSSProperties.getEndpoint();
        String bucketName = aliyunOSSProperties.getBucketName();

        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        //文件上传
        try {
            ObjectListing objectListing = ossClient.listObjects(aliyunOSSProperties.getBucketName());
            return objectListing.getObjectSummaries().stream().map(e -> e.getKey()).collect(Collectors.toList());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }

    public void remove(List<String> keys) throws Exception {
        String endpoint = aliyunOSSProperties.getEndpoint();
        String bucketName = aliyunOSSProperties.getBucketName();

        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        //文件上传
        try {

            DeleteObjectsResult deleteObjectsResult = ossClient.deleteObjects(new DeleteObjectsRequest(aliyunOSSProperties.getBucketName()).withKeys(keys).withEncodingType("url"));
            List<String> deletedObjects = deleteObjectsResult.getDeletedObjects();
            try {
                for (String obj : deletedObjects) {
                    String deleteObj = URLDecoder.decode(obj, "UTF-8");
                    System.out.println(deleteObj);
                }
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}
